:root {
    --primary: #2980FE;
    --primary-soft: #EAF3FF;
    --primary-lighter: #F4F8FF;
    --white: #FFFFFF;
    --bg: #F6F8FB;
    --bg-soft: #F9FBFF;
    --border: #E4EAF2;
    --text: #1F2937;
    --muted: #64748B;
    --dark: #243042;
    --shadow: 0 18px 50px rgba(41, 128, 254, .10);
    --radius: 24px;
    --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #F8FBFF 0%, #FFFFFF 38%, #F6F8FB 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0 0 16px; color: var(--muted); }
h1, h2, h3 { color: var(--dark); line-height: 1.2; margin: 0 0 16px; }
h1 { font-size: clamp(34px, 8vw, 62px); letter-spacing: -1.2px; }
h2 { font-size: clamp(26px, 5vw, 42px); }
h3 { font-size: 21px; }
ul, ol { color: var(--muted); padding-left: 22px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
}
.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--dark); white-space: nowrap; }
.brand-logo { width: 38px; height: 38px; object-fit: contain; border-radius: 12px; }
.nav-toggle {
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--dark);
    border-radius: 999px;
    padding: 9px 14px;
    font-weight: 700;
}
.site-nav {
    display: none;
    position: absolute;
    left: 18px;
    right: 18px;
    top: 66px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 12px;
}
.site-nav.is-open { display: grid; gap: 4px; }
.site-nav a { color: #475569; font-size: 15px; font-weight: 700; padding: 12px; border-radius: 12px; }
.site-nav a:hover { background: var(--primary-soft); color: var(--primary); }
.site-main { min-height: 70vh; }

.container, .section-inner, .page-container {
    width: min(100% - 36px, var(--container));
    margin: 0 auto;
}
.section { padding: 64px 0; }
.section-header { margin-bottom: 28px; max-width: 790px; }
.section-eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 800;
    font-size: 14px;
    margin-bottom: 14px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(41,128,254,.26);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 18px 42px rgba(41,128,254,.34); }
.text-link { color: var(--primary); font-weight: 800; }
.link-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 18px; }
.soft-panel {
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, .04);
}

.web3-dashboard-hero {
    padding: 54px 0 42px;
    position: relative;
    overflow: hidden;
}
.web3-dashboard-hero::before {
    content: "";
    position: absolute;
    inset: -180px -80px auto auto;
    width: 430px;
    height: 430px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(41,128,254,.20), rgba(41,128,254,0) 68%);
}
.hero-grid {
    width: min(100% - 36px, var(--container));
    margin: 0 auto;
    display: grid;
    gap: 28px;
    align-items: center;
}
.hero-copy { position: relative; z-index: 1; }
.hero-copy p { font-size: 18px; max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 26px 0; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span, .mini-tag {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    background: var(--white);
    color: #475569;
    border-radius: 999px;
    padding: 8px 12px;
    font-weight: 700;
    font-size: 13px;
}
.hero-console {
    background: linear-gradient(145deg, rgba(255,255,255,.96), rgba(244,248,255,.94));
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}
.hero-visual { display: grid; place-items: center; border-radius: 24px; background: linear-gradient(180deg,#FFFFFF,#F0F6FF); padding: 18px; min-height: 260px; }
.hero-visual img { max-height: 400px; object-fit: contain; filter: drop-shadow(0 24px 36px rgba(15,23,42,.12)); }
.status-grid { display: grid; gap: 12px; margin-top: 16px; }
.status-card {
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 18px;
    padding: 16px;
}
.status-card span { color: var(--primary); font-weight: 900; font-size: 13px; }
.status-card strong { display: block; color: var(--dark); margin-top: 4px; }
.status-card p { font-size: 14px; margin: 4px 0 0; }

.service-index { padding: 46px 0 68px; }
.service-grid { display: grid; gap: 16px; }
.service-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    min-height: 180px;
    box-shadow: 0 12px 26px rgba(15, 23, 42, .04);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.service-card .service-kicker { color: var(--primary); font-size: 13px; font-weight: 900; margin-bottom: 10px; display: inline-flex; }
.service-card a { color: var(--primary); font-weight: 800; margin-top: 12px; }

.feature-shell {
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 30px;
    padding: 22px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 24px;
    align-items: center;
}
.feature-media {
    background: linear-gradient(180deg, var(--primary-lighter), #FFFFFF);
    border-radius: 24px;
    padding: 18px;
    min-height: 240px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
}
.feature-media img { max-height: 320px; object-fit: contain; }
.feature-list { display: grid; gap: 12px; margin-top: 18px; }
.feature-list div, .check-item {
    border: 1px solid var(--border);
    background: var(--bg-soft);
    border-radius: 16px;
    padding: 14px;
    color: var(--muted);
}
.feature-list strong, .check-item strong { display: block; color: var(--dark); margin-bottom: 4px; }
.digital-assets-hub .feature-shell { background: linear-gradient(135deg,#FFFFFF,#F6FAFF); }
.web3-ecosystem-section .feature-shell { box-shadow: none; }
.hardware-wallet-section { background: var(--bg); }
.hardware-wallet-section .feature-shell { background: #F8FBFF; }
.swap-service-section .feature-shell { background: linear-gradient(135deg,#FFFFFF,#F5F9FF); }

.privacy-boundary-section { padding: 66px 0; }
.boundary-grid { display: grid; gap: 18px; }
.boundary-panel {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 26px;
    padding: 24px;
    border-left: 5px solid var(--primary);
}
.boundary-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.boundary-tags span { background: var(--primary-soft); color: var(--primary); border-radius: 999px; padding: 8px 12px; font-weight: 800; font-size: 13px; }

.submit-chain-section { padding: 66px 0; background: linear-gradient(180deg,#FFFFFF,#F6F8FB); }
.eco-grid { display: grid; gap: 18px; }
.eco-card {
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 24px;
    padding: 24px;
}
.eco-card .number { color: var(--primary); font-size: 28px; font-weight: 900; }

.developer-center-section { padding: 66px 0; }
.dev-grid { display: grid; gap: 18px; align-items: stretch; }
.code-panel {
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: 26px;
    overflow: hidden;
    box-shadow: 0 18px 40px rgba(15,23,42,.06);
}
.code-panel-header { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid var(--border); background: var(--primary-lighter); }
.code-panel-header span { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); opacity: .55; }
.code-panel pre { margin: 0; padding: 22px; overflow-x: auto; color: #334155; font-size: 14px; line-height: 1.7; }
.doc-card { padding: 22px; border: 1px solid var(--border); border-radius: 22px; background: var(--white); }

.process-steps { padding: 66px 0; background: var(--bg); }
.steps-grid { display: grid; gap: 16px; counter-reset: step; }
.step-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 22px;
}
.step-card .step-number {
    width: 36px;
    height: 36px;
    display: inline-grid;
    place-items: center;
    border-radius: 12px;
    background: var(--primary);
    color: var(--white);
    font-weight: 900;
    margin-bottom: 14px;
}

.risk-section { padding: 66px 0; }
.risk-grid { display: grid; gap: 16px; }
.risk-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 22px;
    padding: 20px;
}
.risk-card small { color: var(--primary); font-weight: 900; }

.faq-section { padding: 66px 0; background: var(--bg); }
.faq-list { display: grid; gap: 14px; }
.faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 20px;
}
.faq-item h3 { margin-bottom: 8px; font-size: 18px; }

.cta-section { padding: 72px 0; }
.cta-box {
    text-align: center;
    border-radius: 32px;
    padding: 40px 22px;
    background: radial-gradient(circle at top right, rgba(41,128,254,.18), transparent 32%), linear-gradient(135deg, #FFFFFF, #F2F7FF);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.cta-box p { margin-left: auto; margin-right: auto; max-width: 680px; }

.page-hero { padding: 58px 0 30px; }
.page-hero .page-container { display: grid; gap: 18px; }
.page-summary {
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 26px;
    padding: 24px;
    box-shadow: 0 12px 28px rgba(15,23,42,.04);
}
.page-layout { width: min(100% - 36px, var(--container)); margin: 0 auto; padding: 26px 0 72px; display: grid; gap: 22px; }
.content-card, .side-card, .download-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 24px;
}
.content-card + .content-card { margin-top: 18px; }
.content-card h2 { font-size: 25px; }
.info-grid, .category-grid { display: grid; gap: 16px; margin-top: 18px; }
.info-card {
    border: 1px solid var(--border);
    background: var(--bg-soft);
    border-radius: 18px;
    padding: 18px;
}
.info-card strong { display: block; color: var(--dark); margin-bottom: 6px; }
.aside-stack { display: grid; gap: 18px; align-content: start; }
.side-card h3 { font-size: 19px; }
.side-card a { display: block; color: var(--primary); font-weight: 800; padding: 8px 0; border-bottom: 1px solid var(--border); }
.side-card a:last-child { border-bottom: 0; }
.download-card { text-align: center; background: linear-gradient(180deg,#FFFFFF,#F5F9FF); }
.download-card p { margin-bottom: 20px; }
.guide-steps { display: grid; gap: 14px; margin-top: 18px; }
.guide-step { border-left: 4px solid var(--primary); background: var(--bg-soft); border-radius: 16px; padding: 16px; }
.safety-panel {
    border: 1px solid #DCEBFF;
    background: var(--primary-lighter);
    border-radius: 22px;
    padding: 20px;
    margin-top: 18px;
}
.safety-panel strong { color: var(--primary); }

.download-steps { display: grid; gap: 14px; margin-top: 18px; }
.download-step { display: flex; gap: 14px; padding: 16px; border: 1px solid var(--border); border-radius: 18px; background: var(--white); }
.download-step span { flex: 0 0 auto; width: 34px; height: 34px; border-radius: 12px; background: var(--primary); color: var(--white); display: grid; place-items: center; font-weight: 900; }

.site-footer { background: #F1F5F9; border-top: 1px solid var(--border); }
.footer-inner { width: min(100% - 36px, var(--container)); margin: 0 auto; padding: 36px 0; display: grid; gap: 22px; }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-brand img { width: 44px; height: 44px; object-fit: contain; border-radius: 14px; }
.footer-brand p { margin: 4px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }
.footer-links a { color: #475569; font-weight: 700; }
.footer-bottom { border-top: 1px solid var(--border); text-align: center; padding: 16px; color: var(--muted); font-size: 14px; }

@media (min-width: 640px) {
    .status-grid, .info-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .steps-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: 2px; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .site-nav a { padding: 8px 10px; font-size: 14px; }
    .hero-grid { grid-template-columns: 1fr .92fr; gap: 36px; }
    .status-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .service-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .service-card:nth-child(1), .service-card:nth-child(7) { grid-column: span 2; }
    .feature-shell { grid-template-columns: 1fr 1fr; padding: 34px; }
    .feature-shell.reverse .feature-media { order: -1; }
    .boundary-grid { grid-template-columns: 1.1fr .9fr; align-items: stretch; }
    .eco-grid { grid-template-columns: 1.2fr .8fr .8fr; }
    .dev-grid { grid-template-columns: 1.05fr .95fr; }
    .steps-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .risk-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .page-hero .page-container { grid-template-columns: .9fr 1.1fr; align-items: end; }
    .page-layout { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
    .footer-inner { grid-template-columns: .9fr 1.1fr; align-items: center; }
}

@media (min-width: 1120px) {
    .site-nav a { padding: 8px 12px; }
    .hero-console { padding: 26px; }
    .hero-visual { min-height: 420px; }
}

@media (max-width: 420px) {
    .container, .section-inner, .page-container, .page-layout, .hero-grid { width: min(100% - 28px, var(--container)); }
    .download-btn { width: 100%; }
    .hero-actions { width: 100%; }
    .brand span { max-width: 178px; overflow: hidden; text-overflow: ellipsis; }
    .service-grid { grid-template-columns: 1fr; }
    .content-card, .side-card, .download-card, .page-summary { padding: 20px; }
}